How do you add a product image? I have added a product, inserted an image into the post/product and I assumed that this image would be used as the image but it isn't. I don't see any other fields, can someone help?

Hi,
I'm new to wordpress and have installed the eshop theme. I have the same problem as above. I tried using the featured image but i still don't see my image. At the moment this is all i have achieved. Please help.